12152121530 has 16 divisors (see below), whose sum is σ = 22824854784. Its totient is φ = 4649507280.

The previous prime is 12152121497. The next prime is 12152121563. The reversal of 12152121530 is 3512125121.

It is an interprime number because it is at equal distance from previous prime (12152121497) and next prime (12152121563).

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a junction number, because it is equal to n+sod(n) for n = 12152121496 and 12152121505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26417426 + ... + 26417885.

It is an arithmetic number, because the mean of its divisors is an integer number (1426553424).

Almost surely, 2^12152121530 is an apocalyptic number.

12152121530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12152121530 is a deficient number, since it is larger than the sum of its proper divisors (10672733254).

12152121530 is a wasteful number, since it uses less digits than its factorization.

12152121530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52835341.

The product of its (nonzero) digits is 600, while the sum is 23.

Adding to 12152121530 its reverse (3512125121), we get a palindrome (15664246651).

The spelling of 12152121530 in words is "twelve billion, one hundred fifty-two million, one hundred twenty-one thousand, five hundred thirty".